Clamp



FIG. 1 is a front perspective view of a clamp showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines represent portions of the clamp which are not part of the claimed design.

Dashed lines represent environmental features only and form no part of the claimed design. 

CLAIM The ornamental design for a clamp, as shown and described. 